CVE-2026-125335
Forge: Ed25519 signature verification accepts small-order public keys
Forge (also called node-forge) is a native implementation of Transport Layer Security in JavaScript. Prior to 1.4.3, ed25519.verify() decodes a public key in crypto_sign_open() without rejecting small-order points or their non-canonical encodings. With S = 0 and a small-order R value, an attacker who can choose the public key can produce signatures that verify for many messages, or all messages with the identity key, without a private key. This can defeat proof-of-possession, attribution, non-repudiation, or deduplication checks that rely on a signature being bound to the message. Keys produced by normal Ed25519 key generation are not small-order, so applications that verify only trusted or internally generated public keys are not affected. This issue is fixed in version 1.4.3.
Fixes and workarounds
Fix
node-forge (npm): OSV reports a fixed version 1.4.3. Check the advisory for supported release branches.
Source: OSV GHSA-6889-vf6x-f3g5Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| forge digitalbazaar |
< 1.4.3 (affected) | CNA: GitHub_M |
node-forgenode-forge
npm |
≥ 0; < 1.4.3 (affected, semver); OSV events: introduced 0; fixed 1.4.3Source events (semver)Other versions: unaffected |
OSV GHSA-6889-vf6x-f3g5 |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 3.7 low |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N | CNA: GitHub_M |
| 3.1 / 3.7 low |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/digitalbazaar/forge/security/advisories/GHSA-6889-vf6x-f3g5CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/digitalbazaar/forge/pull/1169CNA: GitHub_M · x_refsource_MISC
- https://github.com/digitalbazaar/forge/commit/1b77e6f20082d7484479303d0252d5f427651295CNA: GitHub_M · x_refsource_MISC
- https://github.com/digitalbazaar/forge/releases/tag/v1.4.3CNA: GitHub_M · x_refsource_MISC
- https://github.com/digitalbazaar/forge/commit/1b77e6f20082d7484479303d0252d5f427651295[email protected]
- https://github.com/digitalbazaar/forge/pull/1169[email protected]
- https://github.com/digitalbazaar/forge/releases/tag/v1.4.3[email protected]
- https://github.com/digitalbazaar/forge/security/advisories/GHSA-6889-vf6x-f3g5[email protected]
- https://github.com/advisories/GHSA-6889-vf6x-f3g5OSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-6889-vf6x-f3g5OSV / GitHub Security Advisories · osv
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